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1 /*****************************************************************************
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2 * Copyright (C) 2013 x265 project
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3 *
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4 * Authors: Steve Borho <steve@borho.org>
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5 *
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6 * This program is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 2 of the License, or
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9 * (at your option) any later version.
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10 *
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11 * This program is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
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19 *
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20 * This program is also available under a commercial proprietary license.
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21 * For more information, contact us at license @ x265.com.
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22 *****************************************************************************/
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23
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24 #ifndef _TESTHARNESS_H_
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25 #define _TESTHARNESS_H_ 1
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26
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27 #include "common.h"
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28 #include "primitives.h"
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29
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30 #if _MSC_VER
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31 #pragma warning(disable: 4324) // structure was padded due to __declspec(align())
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32 #endif
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33
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34 #define PIXEL_MAX ((1 << X265_DEPTH) - 1)
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35 #define PIXEL_MIN 0
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36 #define SHORT_MAX 32767
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37 #define SHORT_MIN -32767
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38 #define UNSIGNED_SHORT_MAX 65535
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39
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40 using namespace X265_NS;
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41
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42 extern const char* lumaPartStr[NUM_PU_SIZES];
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43 extern const char* const* chromaPartStr[X265_CSP_COUNT];
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44
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45 class TestHarness
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46 {
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47 public:
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48
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49 TestHarness() {}
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50
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51 virtual ~TestHarness() {}
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52
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53 virtual bool testCorrectness(const EncoderPrimitives& ref, const EncoderPrimitives& opt) = 0;
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54
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55 virtual void measureSpeed(const EncoderPrimitives& ref, const EncoderPrimitives& opt) = 0;
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56
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57 virtual const char *getName() const = 0;
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58
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59 protected:
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60
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61 /* Temporary variables for stack checks */
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62 int m_ok;
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63
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64 uint64_t m_rand;
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65 };
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66
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67 #ifdef _MSC_VER
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68 #include <intrin.h>
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69 #elif HAVE_RDTSC
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70 #include <intrin.h>
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71 #elif defined(__GNUC__)
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72 /* fallback for older GCC/MinGW */
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73 static inline uint32_t __rdtsc(void)
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74 {
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75 uint32_t a = 0;
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76
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77 asm volatile("rdtsc" : "=a" (a) ::"edx");
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78 return a;
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79 }
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80
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81 #endif // ifdef _MSC_VER
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82
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83 #define BENCH_RUNS 1000
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84
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85 // Adapted from checkasm.c, runs each optimized primitive four times, measures rdtsc
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86 // and discards invalid times. Repeats 1000 times to get a good average. Then measures
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87 // the C reference with fewer runs and reports X factor and average cycles.
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88 #define REPORT_SPEEDUP(RUNOPT, RUNREF, ...) \
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89 { \
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90 uint32_t cycles = 0; int runs = 0; \
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91 RUNOPT(__VA_ARGS__); \
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92 for (int ti = 0; ti < BENCH_RUNS; ti++) { \
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93 uint32_t t0 = (uint32_t)__rdtsc(); \
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94 RUNOPT(__VA_ARGS__); \
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95 RUNOPT(__VA_ARGS__); \
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96 RUNOPT(__VA_ARGS__); \
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97 RUNOPT(__VA_ARGS__); \
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98 uint32_t t1 = (uint32_t)__rdtsc() - t0; \
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99 if (t1 * runs <= cycles * 4 && ti > 0) { cycles += t1; runs++; } \
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100 } \
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101 uint32_t refcycles = 0; int refruns = 0; \
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102 RUNREF(__VA_ARGS__); \
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103 for (int ti = 0; ti < BENCH_RUNS / 4; ti++) { \
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104 uint32_t t0 = (uint32_t)__rdtsc(); \
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105 RUNREF(__VA_ARGS__); \
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106 RUNREF(__VA_ARGS__); \
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107 RUNREF(__VA_ARGS__); \
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108 RUNREF(__VA_ARGS__); \
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109 uint32_t t1 = (uint32_t)__rdtsc() - t0; \
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110 if (t1 * refruns <= refcycles * 4 && ti > 0) { refcycles += t1; refruns++; } \
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111 } \
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112 x265_emms(); \
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113 float optperf = (10.0f * cycles / runs) / 4; \
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114 float refperf = (10.0f * refcycles / refruns) / 4; \
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115 printf("\t%3.2fx ", refperf / optperf); \
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116 printf("\t %-8.2lf \t %-8.2lf\n", optperf, refperf); \
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117 }
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118
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119 extern "C" {
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120 #if X265_ARCH_X86
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121 int PFX(stack_pagealign)(int (*func)(), int align);
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122
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123 /* detect when callee-saved regs aren't saved
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124 * needs an explicit asm check because it only sometimes crashes in normal use. */
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125 intptr_t PFX(checkasm_call)(intptr_t (*func)(), int *ok, ...);
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126 float PFX(checkasm_call_float)(float (*func)(), int *ok, ...);
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127 #else
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128 #define PFX(stack_pagealign)(func, align) func()
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129 #endif
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130
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131 #if X86_64
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132
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133 /* Evil hack: detect incorrect assumptions that 32-bit ints are zero-extended to 64-bit.
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134 * This is done by clobbering the stack with junk around the stack pointer and calling the
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135 * assembly function through x265_checkasm_call with added dummy arguments which forces all
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136 * real arguments to be passed on the stack and not in registers. For 32-bit argument the
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137 * upper half of the 64-bit register location on the stack will now contain junk. Note that
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138 * this is dependent on compiler behavior and that interrupts etc. at the wrong time may
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139 * overwrite the junk written to the stack so there's no guarantee that it will always
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140 * detect all functions that assumes zero-extension.
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141 */
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142 void PFX(checkasm_stack_clobber)(uint64_t clobber, ...);
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143 #define checked(func, ...) ( \
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144 m_ok = 1, m_rand = (rand() & 0xffff) * 0x0001000100010001ULL, \
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145 PFX(checkasm_stack_clobber)(m_rand, m_rand, m_rand, m_rand, m_rand, m_rand, m_rand, m_rand, \
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146 m_rand, m_rand, m_rand, m_rand, m_rand, m_rand, m_rand, m_rand, \
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147 m_rand, m_rand, m_rand, m_rand, m_rand), /* max_args+6 */ \
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148 PFX(checkasm_call)((intptr_t(*)())func, &m_ok, 0, 0, 0, 0, __VA_ARGS__))
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149
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150 #define checked_float(func, ...) ( \
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151 m_ok = 1, m_rand = (rand() & 0xffff) * 0x0001000100010001ULL, \
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152 PFX(checkasm_stack_clobber)(m_rand, m_rand, m_rand, m_rand, m_rand, m_rand, m_rand, m_rand, \
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153 m_rand, m_rand, m_rand, m_rand, m_rand, m_rand, m_rand, m_rand, \
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154 m_rand, m_rand, m_rand, m_rand, m_rand), /* max_args+6 */ \
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155 PFX(checkasm_call_float)((float(*)())func, &m_ok, 0, 0, 0, 0, __VA_ARGS__))
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156 #define reportfail() if (!m_ok) { fflush(stdout); fprintf(stderr, "stack clobber check failed at %s:%d", __FILE__, __LINE__); abort(); }
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157 #elif ARCH_X86
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158 #define checked(func, ...) PFX(checkasm_call)((intptr_t(*)())func, &m_ok, __VA_ARGS__);
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159 #define checked_float(func, ...) PFX(checkasm_call_float)((float(*)())func, &m_ok, __VA_ARGS__);
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160
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161 #else // if X86_64
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162 #define checked(func, ...) func(__VA_ARGS__)
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163 #define checked_float(func, ...) func(__VA_ARGS__)
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164 #define reportfail()
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165 #endif // if X86_64
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166 }
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167
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168 #endif // ifndef _TESTHARNESS_H_
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